Charles james berrill wabd



(No' Model.)

` J ..B. WARD. Automatic Clutch.

No; 241,460. Patented M35/10,1881.

N. PETERS. FhatmLthographer, Washngon, D. C.

.'l l 5o UNITED STATES PATENT OFFICE.:

CHARLES JAMES BERRILL WARD, OF ROOD LANE, LONDON, ENGLAND.

AUTOMATIC CLUTCH.

SPECIFICATION forming part of Letters Patent No..241,460, dated May 10, 1881. Application tiled January 12, 1881. (No model.)

To all whom it may concern: I i

Be it known that 1, CHARLES JAMES BER- RILL WARD, of Rood Lane, in the city of London, England, engineer, have invented new and useful Improvements in Automatic Clutches, of which the following is a clear and exact description.

Figure 1 isa sectional perspective of my iniprovement. Fig. 2 is a transverse section of the same. Figs. 3, 4, 5. and 6 represent moditied structures of the same.

The object of my invention is to convert reciprocating rectilinear motion into constant re1- ative motion in a simple and effective mannen.

While at the same time the travel or stroke of the reciprocating motion canv be varied at will without affecting the regular rotative action of the driven shaft. Toeffect this object I use an improved double clutch, in which the reciprocating motion may be communicated by Cords, straps, Wire, chain, or rack gearing to two drums or disks, causing them to rotate in opposite directions corresponding to the relative directions ot' the reciprocating motion. The drums A A receive the direct action of the reciprocating motion. In Figs. l and 2 the arrangement is suitable for the communication of the reciprocating power by cords, straps, Wire, or chains on the drums A A. In Fig. 3 the reciprocating power would be communicated by racks and thc exterior gearing, D D. All these drums A A, which receive the direct action of the reciprocating motion, which may be produced by treadles, cranks, pistons, or any suitable means,) are arranged to revolve loosely around the shaft S S. Each of these drums A A carries a cani or cams, C C, in a fork'or bracket, F, so as to form a gripingclutch in only one direction of rotation on the inside face of the other drums, B B, substantially as shown.

In Figs. l and 2 the central drum, B B, may be securely keyed to the shaft S S, or allowed to run loose upon it, as required, and a constant direction of rotation is given to the drum, and thereby to both drum and shaft, 1f keyed together, bythe alternate griping action of the cam-gripes in one direction only, carried on the reciprocating drums A. rIhe outside sur face of the central drum, B, in Figs. 1 and 2 may be either suited to drive a constant rotating shaft or drum by a band, strap, chain, or cord, or be tted with gearing.

In Fig. 3 the drum B is divided into two parts, each keyed to the shaft S, and cach part driven alternately by the alternate action ot' the camgripes carried on the outside drums, A A, as above4 described. This divided arrangement of the central drum, B, enables a wheel, G, toothed or otherwise, to be securely lixed or keyed to the shaft S, so that the constant rotative motion produced may becommunicated by said WheelvG to any other gearing it may be desired to drive. In these arrangements the direct reciprocating motion is communicated to the drums A A, as hereinbefore described, and from them is passed through the cam-gripes C O, carried by the said drumsA A, to the interior surface of the drum or drums B-B, Where the frictional gripe takes effect.

In Figs. 4, 5, 6, B B B are the drums which receive the reciprocating power direct, and are thus, as before, arranged to run loosely on the shaft S S. In these latter arrangements, however, the reciprocating drums do not carry the cam-gripes, as in Figs. l and 2, but the camgripes C C are here carried on the disks A AA, which are keyed to the shaft S S S. In these latter cases the reciprocating motions are thus alternately communicated in one direction only from the interior circumferences of the reciprocating drums B B to the cam-gripes C C, and from them to the keyed disks AA, on which they are carried by the .brackets F F, and which, in the illustrations, are themselves keyed to the shaft S S, which thus receives constant rotative motion from each disk alternately.

In Fig. 4 the reciprocating drums B B are suited to receive their motion from a cord pulley, strap, wire, or chain, and in Fig. 6 a single disk being substituted between the two reciprocatin g drums, and carrying both or all the cam-gripes. In Fig. 5tl1e reciprocating drums B B are arrangedto receive their motion from a bevel-gearing, H, and a reciprocating rackand-pinion motion, M.

The Cain-gripe O is ixed in the bracket F by the pin P, on which it turns, and is held up or gripes between its center P and the interior surface of B, being kept to its bearing by the spring Q, and consequently is perfectly automatic in its action.

' exterior drum, B, is in the opposite direction,

from K to L, the cam slides Without gripin g on the interior face of the drum B.

The cam-,gripes may be covered by leather or other suitable material as a griping-face, or they may be made of wood, metal, or other suitable material without special face.

Any number of cam-gripes may be used on a drum or disk to give any required number of griping-points to insure a rm frictional hold.

Une especial advantage of this arrangement of cam-gripe is that the clutch is eifected at the greatest possible distance from the center of motion, so that the gripe is almost instantaneous. At the same time the connection is made at the position of greatest mechanical advantage, so that the least possible amount of griping-clutch will suffice to communicate the power.

Having described my invention, what 1 claim4 as new isl. The shaft S, with one or more cam-clutch When the motion of they hearing disks or drums rigidly secured thereto and facingoutward, combined with one or more drums or disks with laterally-projecting peripheral lian ges arranged to inclose and en gage with said clutch-cams, as set forth.

2. The shaft S and cam-clutches C, pivoted thereto, facing outward in the plane of revolution, combined with a disk or drum provided with a laterally-projecting peripheral flange adapted to inclose and engage with said cam in a plane concentric with the axis of revolution.

3. The shaft S, having the disks A mounted thereon and provided with the brackets F, combined with the camclutches C, pivoted in said brackets, spring Q, whereby the cams are made automatic, and thc disks or drums B.

4. The shaft S, with the cam bearing-disks C mounted rigidly thereon, and the drums or disks B mounted loosely thereon and in engagement with said cams, combined with the reciprocating rack M and pinion H, driven thereby, and communicatin ga reciprocating rotation to said drums B, as and for the purpose set forth.

5. A pulley, B, mounted loosely upon the shaft S, and a hub, a, provided with a disk or arm, A, combined with the cam-faced dog C, pivoted to said arm or disk, and kept in engagement with the inner surface of said pulley bya spring,Q, substantially as and for the purpose set forth.

CHARLES JAMES BERRILL WARD.

In presence of I. C. FELL, S. P. WILDING. 

